(a) Employee members of reserve military units and the National Guard required to attend scheduled reserve drill periods or perform other inactive duty reserve obligations shall be granted military leave of absence without pay as provided by federal law.
(b) Notwithstanding subdivision (a) or any other provision of law, employee members may, at their option, elect to use vacation time or accumulated compensatory time off to attend scheduled reserve drill periods or perform other inactive duty reserve obligations.
(c) If the provisions of this section are in conflict with the provisions of a memorandum of understanding reached pursuant to Section 3517.5, the memorandum of understanding shall be controlling without further legislative action, except that if the provisions of a memorandum of understanding require the expenditure of funds, the provisions may not become effective unless approved by the Legislature in the annual Budget Act.